.webp "Free Cooling controller")
.webp "Cold outdoor air supply")
.webp "Energy efficient cooling")
.webp "Free Cooling regulator")
.webp "Free-air cooling")
.webp "Free air cooler")
EU declaration conformity
Free Cooling Controller
Product description
Free cooling controller for industrial buildings and warehouses. The controller continuously monitors both indoor and outdoor temperatures and automatically determines when free cooling can be used. This method of cooling is more energy-efficient than air conditioning.
Indoor and outdoor temperature are measured with two optional PT500 sensors. The free cooling activation point is adjustable. The analogue output controls fan speed, the relay output controls the fan inlet screen.
All measured parameters, operating states, and configuration settings are accessible via Modbus RTU communication.
Additional specifications and description
What is a free cooling controller?
FCCA8-DM is a free cooling controller for fans, to reduce energy consumption by using cool outdoor air instead of traditional air conditioning whenever conditions are suitable. The free cooling controller decides when and how to use naturally cool outdoor conditions instead of mechanical refrigeration to cool a building. The controller continuously monitors both indoor and outdoor temperatures and automatically determines when free cooling can be used. The free cooling activation point is adjustable. This makes it a practical solution for ventilation and cooling systems where natural outdoor air can help maintain a comfortable indoor temperature while reducing energy costs.
How does free cooling works?
The free cooling controller can control a supply and exhaust fan. It is also possible only to connect the exhaust fan. The fans are controlled via the analogue output. The output type is adjustable so that a wide range of fans can be controlled. For AC fans, a fan speed controller with analogue input can be combined with the free cooling controller. The free cooling controller uses two PT500 temperature sensors to measure indoor and outdoor temperatures. The difference between both is calculated. Free cooling starts when this difference is high enough (this delta is adjustable) and when the indoor temperature is higher than the setpoint. The fans can run at a fixed speed, or at a variable speed.
How does the fan speed control work?
There are two fan speed control modes available. With Variable Fan Speed Control, the controller automatically increases or decreases the fan speed in steps according to the temperature difference between indoor and outdoor air. This allows the system to adapt to changing conditions and operate more efficiently. In this mode, free cooling is carried out in an energy-efficient manner. When the difference between indoor and outdoor temperatures is small, the fan speed is deliberately kept low to avoid wasting energy. When temperature differences are greater, the fan speed is increased to make optimal use of the available free cooling potential.
With Fixed Fan Speed Control, the fan operates at a preset speed whenever free cooling is active. In this mode, the aim is to cool as quickly as possible using fresh outdoor air.
The controller also has a Boost button, which temporarily increases the fan speed for a defined period, making it useful when a quick air refresh is required.
An Override Control function is available when manual operation is required. Both the analogue output (fan speed) and the relay output (damper control) are controlled by the Modbus master device during override. Override takes priority over the automatic control settings, even during an alarm condition.
About the enclosure
The robust grey plastic enclosure is designed for wall mounting and has an IP54 protection rating against ingress of moisture and dirt. It can be exposed to temperatures in the range of -10°C to +60°C.
The RGB LED indicator is integrated in the front cover and provides a quick overview of the controller's status. Green indicates normal operation, yellow indicates a warning, and red indicates an alarm or serious fault. Other colours can indicate functions such as firmware updates or button activation. This makes it easy for users to monitor the system's operating condition and quickly identify when attention is required.
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